Toban Black took a photo of this poster in its original form, which
can be seen here:
Apparently somebody disagreed enough to go to the trouble of not just scratching out the middle line, but fully cutting it out of the poster, completely turning around the original message. I took this photograph because I thought it should be documented - I tore the poster down seconds later and tossed it in the recycle bin. I'm not sure how long this poster was up in this mangled form.